Late congratulations for your birthday,
Heren, and many blessings upon you, your bonny lassie, and your engagement. My mind has escaped me and, very shockingly, I can't think of a song for the occasion, but I'll be singing one when it comes to me, and meanwhile give you my best and heartiest wishes... and will forthwith tramp downstairs to drink a toast of milk to the occasion.
Blessings upon you and the pretty fair maiden!